The 26-year-old singer keeps a detailed record of her life on the road as a memento to hand down to her children in years to come, reported Showbizspy.
"As she tours the world, Gaga notes everything down in her journal. It contains her thoughts, feelings, sketches, pictures and even letters between herself and mum Cynthia.
"She keeps it all together as a memento, so that if she ever has children they'll be able to read all about their pop star mum. Gaga also says that one day she would consider allowing it to be published, if the timing was right," a source said.
